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TPS543C20: 和TPS543C20A区别?

Part Number: TPS543C20

您好,TPS543C20A和TPS543C20这两个芯片是不是只有内部封装的高侧MOS有区别,其他的都一样?还是有其他的区别呢,我看两者的DEMO上,同样的开关频率和输入输出电压,TPS543C20的DEMO输出要少三个100uF电容,影响那么大吗,还有其他区别吗?谢谢回复